| """ |
| ================== |
| Parasite Axes demo |
| ================== |
| |
| Create a parasite axes. Such axes would share the x scale with a host axes, |
| but show a different scale in y direction. |
| |
| This approach uses `mpl_toolkits.axes_grid1.parasite_axes.HostAxes` and |
| `mpl_toolkits.axes_grid1.parasite_axes.ParasiteAxes`. |
| |
| The standard and recommended approach is to use instead standard Matplotlib |
| axes, as shown in the :doc:`/gallery/spines/multiple_yaxis_with_spines` |
| example. |
| |
| An alternative approach using `mpl_toolkits.axes_grid1` and |
| `mpl_toolkits.axisartist` is shown in the |
| :doc:`/gallery/axisartist/demo_parasite_axes2` example. |
| """ |
|
|
| import matplotlib.pyplot as plt |
|
|
| from mpl_toolkits.axisartist.parasite_axes import HostAxes |
|
|
| fig = plt.figure() |
|
|
| host = fig.add_axes([0.15, 0.1, 0.65, 0.8], axes_class=HostAxes) |
| par1 = host.get_aux_axes(viewlim_mode=None, sharex=host) |
| par2 = host.get_aux_axes(viewlim_mode=None, sharex=host) |
|
|
| host.axis["right"].set_visible(False) |
|
|
| par1.axis["right"].set_visible(True) |
| par1.axis["right"].major_ticklabels.set_visible(True) |
| par1.axis["right"].label.set_visible(True) |
|
|
| par2.axis["right2"] = par2.new_fixed_axis(loc="right", offset=(60, 0)) |
|
|
| p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density") |
| p2, = par1.plot([0, 1, 2], [0, 3, 2], label="Temperature") |
| p3, = par2.plot([0, 1, 2], [50, 30, 15], label="Velocity") |
|
|
| host.set(xlim=(0, 2), ylim=(0, 2), xlabel="Distance", ylabel="Density") |
| par1.set(ylim=(0, 4), ylabel="Temperature") |
| par2.set(ylim=(1, 65), ylabel="Velocity") |
|
|
| host.legend() |
|
|
| host.axis["left"].label.set_color(p1.get_color()) |
| par1.axis["right"].label.set_color(p2.get_color()) |
| par2.axis["right2"].label.set_color(p3.get_color()) |
|
|
| plt.show() |
|
|
